NX 8.5 64 bit not utilizing the CPU while doing FEA

[magnusrm]

Hi. When i do FEA (like topology optimization), NX is only using 10-13% of CPU. Are there any settings to allow it to use more?
I have a 1month old PC withj win 7 and Intel i7 quad core CPU.

Thanks

 

[cowski]

You may want to look at
thread561-357474

www.nxjournaling.com

 

[magnusrm]

Hi, and thanks for your reply.
Ive read through the thread, and tried to use the nastran64L.exe as solver executable, but still only 15%ish CPU usage when doing topology optimization.
This might be a bit off-topic, but when i do topo-opt, NX says that element iterative solver (EIS) is not recommended. However, EIS solves the standard FEA much faster.

As you might understand, I am not very familiar with how NX uses resources. I know that Simulia Abaqus CAE has an option where you could specify how many cores you want to use and I was hoping for a similar option in NX.

 

[BlasMolero]

Dear Magnusrm,
Click in the study name and select command "EDIT SOLVER PARAMETERS", and under NX NASTRAN Command keywords write PARALLEL=8, this will tell to NX NASTRAN solver to use the 8 cores of your CPU (if multithreading is disable use PARALLEL=4).

If you want to have permanently issued this command whern creating any study, simply go to to "FILE > UTILITIES > CUSTOMER DEFAULTS > SIMULATION > NASTRAN" and in SOLVER PARAMETERS > ADDITIONAL KEYWORDS enter PARALLEL=8, and you are done, OK?.

Best regards,
Blas.



~~~~~~~~~~~~~~~~~~~~~~
Blas Molero Hidalgo
Ingeniero Industrial
Director

IBERISA
48011 BILBAO (SPAIN)
WEB:

http://www.iberisa.com

Blog de FEMAP & NX Nastran:

http://iberisa.wordpress.com/

 

[magnusrm]

Thank you very much Blas. That did the trick!